31 exv open at a fixed degree. normally it is not used 32 … · 2018. 5. 28. · h1 communication...

SINCLAIR SDV III

31—Forced cooling: After pressing this button, the indoor and outdoor units start, and indoor/outdoor fan and

EXV open at a fixed degree. Normally it is not used 32—Electrical expansion valve drive port: EXV_B 33—Communication between indoor/outdoor units, RS-485 signal Malfunction Code of Outdoor unit

Display Malfunction or Protection Remark E0 Communication malfunction between outdoor units Only auxiliary unit display E1 Phase sequence error E2 Communication malfunction between indoor/outdoor

units

E3 T3 temperature sensor malfunction E4 T4 temperature sensor malfunction E5 T7D temperature sensor malfunction E8 Outdoor Unit address setting error H0 Mode conflict malfunction Only main unit display H1 Communication malfunction between 780034 and 9177 H2 Amount of indoor units decrease malfunction Only main unit display H3 Amount of indoor units increase malfunction Only main unit display P1 High pressure protection P2 Low pressure protection P3 Digital Scroll Compressor current protection P4 Compressor discharge temperature protection P5 Condenser high temperature protection P7 NO.1 Fixed Compressor current protection P8 NO.2 Fixed Compressor current protection

406

Troubleshooting

357

11. Troubleshooting 12.1 Indoor Units lamp flashes:

No Display Contents Explanation of Malfunction

1 All lamps are off Standing-by 2 Operation lamp is on ON 3 PRE./DEF. lamp is on Anti-cooling or Defrosting 4 Timer lamp is on Timer function is on 5 Timer lamp flashes Indoor/outdoor communication malfunction 6 Operation lamp flashes Indoors temperature Sensor abnormal 7 PRE/DEF. Lamp flashes Mode-confliction malfunction 8 Alarm lamp flashes quickly Water-level switch abnormal 9 Alarm lamp flashes slowly Outdoor malfunction or protection

LED and LCD display on the new panel of 4-way cassette

No. Error or Protection Operation Timer DEF/FAN Alarm Recoverable or not Code

1 Room temperature sensor checking channel is abnormal X X X Yes E2

2 Evaporator temperature sensor checking channel is abnormal

X X X Yes E3

3 Condenser temperature sensor checking channel is abnormal

X X X Yes E4

4 Pump sensor malfunction X X X Yes E5

5 Outdoor protection (lack of phase, phase sequence, etc.) Yes E6

6 EEPROM malfunction X X No E7

7 Water level alarm X X X Yes or No (if last for 3 min the error hasn’t been eliminated

yet) E8

8 Communication malfunction Yes E1 （X stands for Elimination(OFF)， stands for flashing at 5Hz） LCD display on the wall mounted unit

Code Malfunction Remark

EE Water level checking malfunction E6 Mode-confliction malfunction E5 T3 or T4 or digital scroll compressor discharge Temp. sensor malfunction E4 T2B Temp. sensor malfunction E3 T2A Temp. sensor malfunction E2 T1 Temp. sensor malfunction E1 Communication malfunction

Troubleshooting

358

① Timer lamp flashes: Indoor/outdoor communication malfunction

Timer lamp flashes: Indoor/outdoor communication malfunction (the outdoor PCB plate will display E2 or there is no power supply for the outdoor unit)

Exist

OK

Short circuit or open circuit of communication wire P, Q and E

Check communication wire (generally measuring resistance between P, Q and E)

Exist

OK

Irregular connection of communication wire (causing E2 error and indefinite variation or reduction in the number of indoor units)

Repetition of address code to indoor unit

Some indoor units are not power-on (reduction in the number of indoor units)

Communication wires does not be separated from Power wires, causing

interference

Communication wire is not in serial connection (such as star connection or

parallel connection)

There are other electronic magnetic interference sources nearby, such as transformer, strong solar light and so on

Rule out interference source, or add shielding and filters

OK

Exceed Make proper regulation or strengthen signal

Error

OK

Communication wire is too long, exceeding

specified value.

Chip fault, or chip foot sheds off, or chip is inverted (correct mode is semicircular bent alignment)

Reinstall chip, or install other chip with same model on the faulty unit, to check whether there is something wrong with chip.

OK

Mainboard error: For example, getting wet

Replace mainboard

OK

Troubleshooting

359

Note: 1. Press the “manual” button on remote control receiver of indoor unit in turn (display the address code of

this indoor unit when pressing and holding for 5 seconds (display capacity code when pressing and holding for 10 seconds), check all address codes.

Codes to be inspected are as follows: Indicator OPERATION TIMER DEF / FAN ALARM Code 8 4 2 1

Address code 0 1 2 3 4 5 6 7 8 9 Capacity (x 100W) 22 28 36 45 56 71 80 90 112 140 Horsepower (HP) 0.8 1.0 1.2 1.6 2.0 2.5 3.0 3.2 4.0 5.0

For example: After pressing and holding for 5 seconds, "Operation" light and "Alarm" light is constant-on, which indicates that the address code is ( 8 + 1 ) = 9; (Note: If the indicator is constant-on, calculate according to the above-mentioned formula. If the indicator is flashing, add 16 to the original calculated code, for example: After pressing and holding for 5 seconds, "Operation" light and "Alarm" light is flashing, which indicates that the address code is 16 + ( 8 + 1 ) = 25. ) After pressing and holding for 10 seconds, "Operation" light and "Alarm" light is constant-on, which indicates that the address code is ( 4 + 1 ) = 5; indicating the capacity of this unit is 71 × 100W ( 2.5 HP ).

2. If the signal is weak, connect 100 Ω resistor between terminal P and Q on the end indoor unit in serial,

or connect a small capacitor between terminal P and Q on outdoor unit in serial (as follows).

Signal wire must be shielded wire; indoor units must be connected in serial. At the end, connect a resistor on indoor unit or a capacitor between P and Q on outdoor unit.

Outdoor Unit

PQ

E

PQ

E

R=100ΩCapacitor

Indoor Unit Indoor Unit Indoor Unit Indoor Unit

For “manual” button of indoor unit, show the address code when pressing and holding for 5 seconds, and show the capacity code when pressing and holding for 10 seconds

Troubleshooting

360

② Operation lamp flashes: Indoors temp. Sensor abnormal

Caution: There are three temp. sensors in indoor unit, i.e. T1, T2 and T2B, of which fault in any one will

cause operation light flashing and report error.

OK

OK

Operation lamp flashes

Exist

OK

T1, T2 or T2B Connecting wire between sensor and mainboard gets loose

Reconnect and ensure that the connection is reliable.

Temperature sensor is short-circuited or punctured

Exist Replace sensor


Error Reinstall chip, or install other chip with same model on the faulty unit, to check whether there is something wrong with chip.


Replace mainboard

OK

Troubleshooting

361

③ DEF. Lamp flashes：Mode-confliction malfunction In the below table, “Yes” indicates existing mode conflict, “No” indicates no mode conflict.

Cooling Heating Air-supply OFF Cooling No Yes No No Heating Yes No Yes No

Air-supply No Yes No No OFF No No No No

When indoor unit receiving heating operation instruction, it will transmit the operation mode signal to outdoor unit to conduct prior heating control, including: In process of cooling and air-supply mode operation: After receiving the heating operation instruction, outdoor unit stops cooling and supplying air, and transfers to heating mode three minutes later after the shutdown of compressor; indoor unit required to conduct cooling and air-supply mode operation is on standby mode and displays mode conflict fault. In process of heating mode operation: Ignore cooling and air-supply mode operation instruction, outdoor unit keeps on operating according to heating mode; Indoor unit with cooling and air-supply mode operation displays mode conflict fault. If heating mode operation stops (except that indoor unit reaches setting temperature because of heating), cooling and air-supply mode restarts up and conducts operation three minutes later.

④ Alarm lamp flashes: Water-level switch abnormal

OK

OK

Alarm lamp flashes

Exist

OK

Water-level switch connecting wire between switch and main board gets loose


There is something wrong with the water-level switch

Exist Replace switch




Replace mainboard

OK

Troubleshooting

362

⑤ Alarm lamp flashes slowly: Outdoor malfunction or protection Examine outdoor unit, and analyze according to actual condition

⑥ Congealing Dew or Water Leakage in Indoor Units

Congealing dew

Fault

Fault

Congealing dew or water leakage in indoor unit

Check the source of water leakage, and generally it is from condensing water or congealing dew; congealing dew is generally accumulated at air outlet port and panel. Condensing water is generally formed in drain pump or condensate pipe.

Is the air outlet blocked? Is air flow small? Is indoor side humidity large? Is fan shutdown, but EXV valve is opened (because of no unified power supply to indoor units)?

Condensing water

Check whether output signal of connection terminal of water level switch on PCB plate is correct? Is the operation of drain pump normal?

Replace indoor PCB plate or drain pump

OK

Check whether lifting height of condensing water is within specified scope? Whether water outlet is blocked? Whether condensing water has proper slope (1/100)? Whether connector of pipe and throttle part have been conducted insulation connection well?

Alter according to Technique Manual

OK

Is the general drain pipe blocked (if being blocked, There’ll be many indoor units are leaking water)? Is general condensing water pipe equipped with air outlet?

Troubleshooting

363

12.2 Outdoor unit’s LED indication: No Display Malfunction or Protection Remark

1 E0 Communication error between outdoor units Only slave unit display 2 E1 Phase protection All the outdoor units display 3 E2 Communication error between indoor unit and master unit All the outdoor units display 4 E4 Outdoor temperature sensor error All the outdoor units display 5 E5 Digital discharge temperature sensor error All the outdoor units display 6 E8 Outdoor unit address error All the outdoor units display 7 H0 Model conflict error All the outdoor units display 8 H1 Communication malfunction between chips All the outdoor units display 9 H2 Quantity of outdoor unit decreases Only master unit display 10 H3 Quantity of outdoor unit increases Only master unit display 12 P1 Hi-pressure protection All the outdoor units display 13 P2 Low-pressure protection All the outdoor units display 14 P3 Compressor current Protection All the outdoor units display 15 P4 Compressor discharge temperature protection All the outdoor units display 16 P5 Outdoor condenser high temperature protection All the outdoor units display 18 P7 Current protection, No.1 fixed compressor All the outdoor units display 19 P8 Current protection, No.2 fixed compressor 14/16HP outdoor units display

Troubleshooting

364

I. E0: Communication error between outdoor units

Replace mainboard

E0: Communication error between 0utdoor units

Error

OK

Check the connection of communication wire of outdoor units: H1, H2, E of all outdoor units shall be connected with shielded wire and shall not be reversed (polarity connection: H1 connected to H1, H2 connected to H2), as well as ensure no short circuit.

Error

Reset address code of outdoor units

Reconnect outdoor side communication wire.

Check address code setting of outdoor units: Master Unit is set to 0, Slave Unit 1 is set to 1, Slave Unit 2 is set to 2, Slave Unit 3 is set to 3; an address of above 3 is invalid

OK

OK



OK


Troubleshooting

365

II. E1: Phase-sequence Error

Note: Because all electric motors of SDV III outdoor units are connected to phase C, if each outdoor unit is

connected according to normal phase-sequence of A, B, and C. when the number of outdoor units is large, current difference between phase C and other two phases at main power supply shall be very large too, leading to disconnection of the air breaker at power distribution cabinet or fusing of terminal blocks. Therefore, when the number of outdoor units is large, the phase sequence shall be shifted for evenly distributing motor current to three phases.

OK

OK


E1: phase-sequence error of outdoor units

Error

OK

Check phase-sequence of three-phase power: keep it consistent with the phase-sequence required by the operation of compressor, and reversed connection shall lead to the rollback of compressor (for the program in the chip only check phase-sequence during initial power on).

Exchange the power wire of any two phases within three phases

Check whether three-phase power is in phase-loss: Ordinary malfunction is that the power terminal block of one phase become loose (Phase-loss or phase offset shall cause the current of compressor is excessive, leading to abnormal operation)

Phase-loss Check power supply source and power wire



Replace mainboard

OK

Troubleshooting

366

III. E2: Communication Error between Outdoor Unit and Indoor Units; and indefinite variation in the number of indoor unit detected by outdoor unit

E2: communication error between outdoor unit and indoor units; and indefinite variation in the number of indoor units detected by outdoor unit

Exist

OK

Short circuit or open circuit of communication wire P, Q and E

Check communication wire (generally measuring resistance between P, Q and E)

Exist

OK

Irregular connection of communication wire (causing E2 error and indefinite variation or reduction in the number of indoor units)

Repetition of address code to indoor unit

Some indoor units are not power-on (reduction in the number of indoor units)

Communication wires does not be separated from Power wires, causing

interference

Communication wire is not in serial connection (such as star connection or

parallel connection)

There are other electronic magnetic interference source nearby, such as transformer, strong solar light and so on

Rule out interference source, or add shielding and filters

OK

Exceed Make proper regulation or strengthen signal

Error

OK

Communication wire is too long, exceeding

specified value.


Reinstall chip, or install other chip with same model on the faulty unit, to check whether there is something wrong with chip.

OK


Replace mainboard

OK

Troubleshooting

367

Note: 1. Press the “manual” button on remote control receiver of indoor unit in turn (display the address code of

this indoor unit when pressing and holding for 5 seconds (display capacity code when pressing and holding for 10 seconds), check all address codes.

Codes to be inspected are as follows: Indicator OPERATION TIMER DEF / FAN ALARM Code 8 4 2 1

Address code 0 1 2 3 4 5 6 7 8 9

Capacity (x 100W) 22 28 36 45 56 71 80 90 112 140 Horsepower (HP) 0.8 1.0 1.2 1.6 2.0 2.5 3.0 3.2 4.0 5.0

For example: After pressing and holding for 5 seconds, "Operation" light and "Alarm" light is constant-on, which indicates that the address code is ( 8 + 1 ) = 9; (Note: If the indicator is constant-on, calculate according to the above-mentioned formula. If the indicator is flashing, add 16 to the original calculated code, for example: After pressing and holding for 5 seconds, "Operation" light and "Alarm" light is flashing, which indicates that the address code is 16 + ( 8 + 1 ) = 25. ) After pressing and holding for 10 seconds, "Operation" light and "Alarm" light is constant-on, which indicates that the address code is ( 4 + 1 ) = 5; indicating the capacity of this unit is 71 × 100W ( 2.5 HP ).

2. If the signal is weak, connect 100 Ω resistor between terminal P and Q on the end indoor unit in serial, or connect a small capacitor between terminal P and Q on outdoor unit in serial (as follows).

For “manual” button of indoor unit, show the address code when pressing and holding for 5 seconds, and show the capacity code when pressing and holding for 10 seconds

Signal wire must be shielded wire; indoor units must be connected in serial. At the end, connect a resistor on indoor unit or a capacitor between P and Q on outdoor unit.

Outdoor Unit

PQ

E

PQ

E

R=100ΩCapacitor

Indoor Unit Indoor Unit Indoor Unit Indoor Unit

Troubleshooting

368

IV. E4: Outdoor temperature sensor error

Case: There is no display on PCB of one system, and the problem still exists after replacing mainboard. Voltage values on measuring plate (such as 220V, 5V, 12V, etc) are normal; after measuring resistance value of sensor, find that T4 thermo-bulb is earth-continuity, and further discover that the thermal cable of T4 sensor is punched by bolt, as follows:

OK

OK

E4: Outdoor temperature sensor error

Exist

OK

T4 Connecting wire between sensor and mainboard gets loose







Replace mainboard

OK

Sensor wire T4 is worn out and connected with sheet metal

After being reconnected, the system becomes normal

Troubleshooting

369

V. E5: Discharge temp. sensor error of digital comp.

Case: Digital Scroll Comp. has two temperature sensors, one is in the compressor, the other one is on the

discharge pipe.


Replace mainboard

OK

E4: Discharge temp. sensor error of digital comp.

Exist

OK

Discharge temp. Connecting wire between sensor and mainboard gets loose






OK

Troubleshooting

370

H2: Fault of Reduction in the Number of Outdoor Units

Note: For modules combination, slave unit shall not be started up due to power failure of one slave unit, damage of PCB or no communication between master unit and slave unit. Then under heating mode, the high-pressure gas discharged from gas pipe of master unit goes through gas pipe of slave unit, accumulator of slave unit, gas balance pipe, accumulator of master unit and then comes back to the suction pipe of compressors of master unit (as shown in blue solid line of right figure); That is equal to the high-temperature & high-pressure refrigerant after being discharged by master unit directly comes back to the suction side of compressor, which shall lead to the over-loading operation of compressors of master unit and even being burned out.

OK OK

H2: Fault of reduction in the number of outdoor units

Exist

OK

During operation, communication wire between outdoor units gets loose (H1, H2, and E)

Reconnect and ensure that connection is reliable

Some outdoor unit is power-down when in modules combination

Exist Comes back to normal

after being re-powered on

OK




Replace mainboard

Troubleshooting

371

VII. P1: High-pressure Protection

OK

OK

Exist There is blockage in liquid side pipeline of system, such as oblate liquid pipe or valve, or closed stop valve etc

Examine system and eliminate stemming

P1:High-pressure protection (; R410a refrigerant is

protected above 4.4MPa, and restores under 3.2MPa.)

Heat dispersion function of outdoor heat exchanger is unqualified: For example, the heat exchanger is dirty, air outlet and air-back line is short-circuited, outdoor fan stops operating or air speed is over-low, inlet and outlet air is blocked in heat exchanger, distance between outdoor units is too short etc

Exist Check one by one and

remove fault

OK

Refrigerant is injected too much, symptom:

High-pressure is high, low-pressure is high and

discharge temperature is low

Exist Discharge partial refrigerant, supplement proper refrigeration oil if refrigeration oil is discharged during

such process

OK

There is air or nitrogen in system (air comes from the incomplete vacuum-drying, and nitrogen is caused by directly pressurizing to ball valve),

symptom: Pressure of high/low pressure is high, discharge and suction temperature is high,

current is large, there maybe abnormal noise in compressor, and pointer of pressure gauge is

jittering

Exist Discharge all refrigerant, and redeliver vacuum and inject

refrigerant. During this process, supplement proper refrigeration oil

if refrigeration oil is let off

Chip fault, or chip foot sheds off, or chip is inverted (correct mode is semicircular bent alignment) or open circuit caused by falling off of high-pressure switch embolism



Replace mainboard

OK

Troubleshooting

372

VIII. P2: Low-pressure Protection

OK

OK

OK

Exist

OK

System gas pipeline is blocked, for example, pipe is squashed or EXV valve and stop valve does not be opened or filter is blocked etc, symptom: Discharge and suction temperature is little higher, low-pressure is little lower, current is low and suction pipe may be frosted

Examine system and eliminate stemming

P2：Low-pressure protection (R410a refrigerant is protected under 0.05MPa, and

restored above 0.15MPa (another one is protected under0.14MPa, and restored above0.3MPa).

Operation of heat exchanger in indoor unit side is abnormal: for example, heat exchanger or filter mesh is dirty, resistance at air outlet is too strong, indoor fan does not run or air speed is too low etc

Exist Check one by one and

remove fault

Exist Supplemented refrigerant is insufficiency or refrigerant in system is leaked out

Supplement refrigerant or repair leakage

Be blocked by dirty substance or ice

Flush filter; for being blocked by ice, system need to be cleaned, and see <Cleaning of Moisture in System> for operation in detail

Chip fault, or chip foot sheds off, or chip is inverted (correct mode is semicircular bent alignment) or open circuit caused by falling off of low-pressure switch embolism



Replace mainboard

OK

Troubleshooting

373

IX. P3, P7, P8: Current Protection of Each Compressor

OK

OK

OK

OK

OK

P3, P7, P8: Current protection of each compressor (protection happens when current of

single compressor is higher than 16 A)

Exist Loading of system is over-large, such as high-temperature cooling or too many indoor units, which shall lead to over-high evaporating temperature

Regulate loading or increase outdoor unit

The supplementary quantity of refrigerant is toomuch in system, or there is air or nitrogen in system(air comes from the incomplete vacuum-drying, andnitrogen is caused by directly pressurizing to ball valve), symptom: Pressure of high-low pressure ishigh, discharge and suction temperature is high,current is large, there maybe abnormal noise in compressor, and pointer of pressure gauge isjittering

Exist Discharge partial or all refrigerant, redeliver vacuum and inject refrigerant. During this process, supplement proper refrigeration oil if refrigeration oil is let off

OK

Heat dispersion function of outdoor heat exchanger is unqualified: For example, the heat exchanger is dirty, air-outlet and air-back line is short-circuited, outdoor fan stops operating or air speed is over-low, inlet and outlet air is blocked in heat exchanger, distance between outdoor units is too small etc

Exist Check one by one and remove fault

Exist Examine system and eliminate stemming

There is blockage in liquid side pipeline of system, such as oblate liquid pipe, or close stop valve etc

Compressor is in fault, one heavy-current line is short-circuited, or one heavy-current terminal does not be tightened.

Exist

Examine heavy-current line, and measure resistance between

three-phase terminals of compressor (when resistance between three-phase

terminals is 2~5Ω and resistance between terminal and ground is ∞,

compressor is normal.)




Replace mainboard

OK

Troubleshooting

374

X. P4: Discharge Temperature Protection


Replace mainboard

OKOK

OK



Exist

Flush filter; for being blocked by ice, system need to be cleaned, and see <Cleaning of Moisture in System> for operation in detail OK

There is a large amount of air or nitrogen in system, symptom: Discharge and suction temperature is high, current is large, high/low pressure is high and pointer of pressure gauge is jittering

Exist Discharge all refrigerant in system, and redeliver vacuum and supplement refrigerant. If refrigeration oil is discharged, proper supplementation is required.

When cooling, indoor loading is over-large, which causes over-high suction temperature, leading to high discharge temperature?

Exist

Reduce the loading of indoor unit, and ensure the matching proportion between indoor unit and outdoor unit is within 120%

OK

Exist Being blocked by dirty substance or ice, which often happens in filters (there’re two filters in suction pipe,before and after the accumulator)

Low-pressure side of system is blocked or pipeline is squashed, symptom: Discharge and suction temperature is little higher, low pressure is little lower, current is low and suction pipe may be frosted

OK

Exist Supplemented refrigerant is too little or refrigerant in system is leaked

Supplement refrigerant or repair leakage

P4: Discharge temp. protection(it happens when one comp.’s temp. is too high)

Operation of low-pressure side heat exchanger is abnormal (such as heat exchanger or filter mesh is dirty) or fan stops operating, air flow is small, which shall cause that refrigerant could not be evaporated completely and get into compressor in the form of liquid.

Exist Clean heat exchanger or filter mesh, check air pipe or air duct etc

OK

Troubleshooting

375

XI. P5: High-temperature Protection of Pipe Temperature

Note: ①. H1 (communication error between 9177 and 780034): General solution is to replace PCB plate. ②. H3 (Fault of Increase in the Number of Outdoor Units):This fault can resume itself after 3 minutes. ③. The Trouble-shooting of E3 ( T3: outlet temperature of condenser) is similar with E5.

OK

OK

OK

Exist

OK

OK

OK

P5: High-temperature Protection of Pipe Temperature (temperature protection of

condenser outlet)

Exist Loading of system is over-large, such as high-temperature cooling or too many indoor units, which shall lead to over-high evaporating temperature

Regulate loading or increase outdoor unit

There is air or nitrogen in system (air comes from the incomplete vacuum-drying, and nitrogen is caused by directly pressurizing to ball valve), symptom: Pressure of high/low pressure is high, discharge and suction temperature is high, current is large, there maybe abnormal noise in compressor and pointer of pressure gauge is jittering

Exist

Discharge all refrigerant, and redeliver vacuum and inject refrigerant. During this process, supplement proper refrigeration oil if refrigeration oil is let off

Heat dispersion function of outdoor heat exchanger is unqualified: For example, the heat exchanger is dirty, air-outlet and air-back line is short-circuited, outdoor fan stops operating or air speed is over-low, inlet and outlet air is blocked in heat exchanger, distance between outdoor units is too small etc

Check one by one and remove fault

Exist Examine system and eliminate stemming

System liquid side pipeline is blocked, for example, pipe is squashed or body of valve is blocked, or stop valve does not be opened (this situation often happens under high-pressure protection firstly)




Replace mainboard

OK

Fault of thermo-sensor, connecting wire or terminals of connecting wire

Exist Replace thermo-sensor

or connecting wire

31 exv open at a fixed degree. normally it is not used 32 … · 2018. 5. 28. · h1 communication...

Documents